Size: 13cm x 9cm How long will a Heavy Duty Unsponge last? With regular dish soap and cleaners the average life is 3-4 months, with bleaches and heavy chemicals up to 3 months. Is it biodegradable? All parts of the Heavy Duty Unsponge are plant based so it will break down completely with time. If you’d like to compost it just cut it into small pieces and shred it with your fingers. Benefits of Unsponge Super Absorbent 100% Reusable Eco-friendly Reduces Landfill Economical Biodegradable/Compostable Check out our other kitchen products including Unpaper Towels Care Instructions: As your Unsponge is made from 100% natural materials, you can wash it with your regular washing to keep it in it's best condition.  Air dry only.  Do not use bleach or fabric softeners.  Do no use on rough or sharp surfaces as this will cut into the fabric.